======Cleaning the Floor with Liquid Nitrogen======


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**Alternative titles:** Leidenfrost Effect, Cryogenic Dust Cleaner
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====Summary====                   
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====Procedure====  
  - Select a smooth, hard floor surface such as linoleum, tile, or polished concrete.  
  - Ensure the area is free of obstacles and tripping hazards.  
  - Using insulated gloves and a cryogenic-safe container, pour a small amount of liquid nitrogen onto the floor.  
  - Observe as the nitrogen races across the surface, propelled by a thin vapor cushion.  
  - Watch how the moving vapor cloud sweeps dust and light debris away, including from under furniture.  



====Links==== 
Cleaning the Floor with Liquid Nitrogen- hashi856: 
{{youtube>ZvZHPd4s8GI?}}\\



====Variations====
  * Try pouring nitrogen on different surfaces (tile, wood, metal) and compare how far it travels.  
  * Place light objects like tissue or confetti on the floor to watch them be swept aside.




====Safety Precautions====
  * Safety glasses required.  
  * Wear cryogenic gloves when handling liquid nitrogen.  
  * Use only in a well-ventilated area to prevent nitrogen buildup.  
  * Do not pour large amounts that may pool and cause frost damage to flooring.  
  * Keep clear of the flowing nitrogen to avoid contact with skin or footwear.





====Questions to Consider====
  * Why does liquid nitrogen “skate” across the floor instead of soaking in?  
  * What role does the Leidenfrost effect play in this demonstration?  
  * How does the rapid vaporization of nitrogen move dust and debris?  
  * Why does the nitrogen vapor travel under furniture instead of staying in place?  
  * Could this principle be applied to other cleaning or industrial processes?